Sh4mefulNetwork: VIS-BLOCK
This page shows DMARC authentication failures originating from the VIS-BLOCK network. Learn more about this data.
Network Information
- Org ID:
MCICS- Address:
- 22001 Loudoun County Pkwy, Ashburn, VA 20147
- Countries:
- US
- Unique IPs:
- 2
- CIDRs:
-
71.184.0.0/13, 71.181.128.0/17, 71.182.0.0/15,74.96.0.0/12
Analysis
This network has contributed 2 unique IP addresses across 6 failed authentication events, accounting for 18 messages. Activity spans from September 13, 2024 to March 17, 2025, with peak volume in September 2024 (2 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 71.187.96.27 (4 failures), 74.103.252.169 (2 failures). Failures from VIS-BLOCK are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.
Countries